Effect of chlorpyriphos 20ec on predatory green lacewing Chrysoperla zastrowi Sillemi under laboratory condition

Abstract

Chlorpyriphos were slightly harmful to the predator, Chrysoperla zastrowi. Higher egg mortality was recorded with chlorpyriphos at 2000, 1500, 1000 and 750 ml/ha (65.00%, 62.00%, 61.33% and 56.00% respectively). The low grub mortality was observed in chlorpyriphos 20 EC 750 ml/ha (51.00%) at 48 hours of treatment whereas it was high in chlorpyriphos 20 EC 2000 ml/ha (82.50%) followed by chlorpyriphos 20 EC at 1500 ml/ha (77.50%), chlorpyriphos 20 EC 1000 ml/ha (60.00%) and Dursban 20 EC 1000 ml/ha (62.50%). Treatment II also showed that, the per cent mortality after 48 h due to the concentration of chlorpyriphos 20 EC at 1000, 750, 500 and 250 was 70.00, 66.67, 60.00, 44.00, whereas it was also high in Dursban 20 EC 500 ml/ha recorded 63.33 per cent mortality compared to dimethoate 500 ml/ha 46.67 per cent mortality. Chlorpyriphos were slightly harmful to the predator, Chrysoperla zastrowi.